PI: Andrew Skemer, UC Santa Cruz, firstname.lastname@example.org
Address: Astronomy and Astrophysics Board of Study, Natural Sciences II, Santa Cruz, CA, 95064 USA
CoI: Caroline Morley, UC Santa Cruz
CoI: Katelyn Allers, Bucknell U.
CoI: Mark Marley, NASA Ames Research Center
CoI: Jonathan Fortney, UC Santa Cruz
CoI: Jackie Faherty, Carnegie Institution of Washington
CoI: Thomas R Geballe, Gemini Observatory
CoI: Michael Cushing, U. of Toledo
CoI: Adam C Schneider, U. of Toledo
CoI: Gordon L Bjoraker, NASA Ames Research Center
Title: A Thermal Infrared Spectroscopic Sequence of the Coldest Brown Dwarfs
Abstract: The coldest exoplanets and brown dwarfs emit most of their light through an atmospheric window at ~4-5 microns, just like Jupiter. But with JWST set to launch in 2 years, there are no published 5 micron spectra of extrasolar planets or brown dwarfs colder than 700 K. Recently, our team obtained the first spectrum of WISE 0855, a 250 K brown dwarf, using Gemini/GNIRS at 5 microns. The spectrum reveals water vapor, clouds, and an overall appearance that is strikingly similar to Jupiter. We are now proposing to extend the use of 5 micron spectroscopy to a sequence of brown dwarfs spanning 700 K to 250 K, with the goal of understanding how water vapor, clouds, and non-equilibrium chemistry vary with temperature. Obtaining these observations now will allow us to refine our exoplanet and brown dwarf atmosphere models at thermal infrared wavelengths in time for JWST.
Program Type: Standard/Galactic
Run 1 (2016B): GEM-NQ/GNIRS -- 42hrs band 1 (GN-2016B-Q-23)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360